I want to build a server with a minimum of 20TB - 30TB space. I want to make a single server with many 2TB HDDs. How is it possible to have 20TB-30TB for a single folder ie. /var/www which will contain my server files. It is a web server.
closed as not constructive by Tom O'Connor, John Gardeniers, Ward, Adrian, WesleyDavid Nov 29 '12 at 18:20
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The technology you are looking for is called RAID (Redundant Array of Independent/Inexpensive Disks). You can create a disk array on a number of levels.
Any of these might be suitable for a web server, exact configuration depending on requirements.
I'll add that 4 TB drives have just started appearing, which could significantly lower the cost of a 20-30 TB array.
The magic Keyword in this case is Logical Volume Manager (short LVM). With this you can create volumes, and attach harddrives to this volume. Then you can mount this volume on /var/wwww
It is possible to use this LVM with RAID system in Combination. So you can push speed or data-security(in case one drive breaks down). And i would reccomend you to use RAID 5 or RAID 6 if you have that many drives.
I used to spend nearly to weeks to understand lvm, Raid and to set up a testing environment. But it's worth. It's like juggleing with data.